unit: add DefaultDependencies= setting

[elogind.git] / src / service.c

diff --git a/src/service.c b/src/service.c
index d5e681a3f492051fdd70ec4e663828a28446d61d..04ed6843935e6b719cc74c06b49463646574435a 100644 (file)
--- a/src/service.c
+++ b/src/service.c
@@ -543,10 +543,8 @@ static int service_load_sysv_path(Service *s, const char *path) {
 
                                         if (unit_name_to_type(m) == UNIT_SERVICE)
                                                 r = unit_add_name(u, m);
-                                        else {
-                                                if ((r = unit_add_dependency_by_name_inverse(u, UNIT_REQUIRES, m, NULL, true)) >= 0)
-                                                        r = unit_add_dependency_by_name(u, UNIT_BEFORE, m, NULL, true);
-                                        }
+                                        else
+                                                r = unit_add_two_dependencies_by_name_inverse(u, UNIT_AFTER, UNIT_REQUIRES, m, NULL, true);
 
                                         free(m);
 
@@ -667,20 +665,18 @@ static int service_load_sysv_path(Service *s, const char *path) {
         if ((r = sysv_exec_commands(s)) < 0)
                 goto finish;
 
-        if (!s->sysv_runlevels || chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
+        if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
                 /* If there a runlevels configured for this service
                  * but none of the standard ones, then we assume this
                  * is some special kind of service (which might be
                  * needed for early boot) and don't create any links
                  * to it. */
 
-                if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0 ||
-                    (r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
-                        goto finish;
+                s->meta.default_dependencies = false;
 
-        } else
                 /* Don't timeout special services during boot (like fsck) */
                 s->timeout_usec = 0;
+        }
 
         /* Special setting for all SysV services */
         s->type = SERVICE_FORKING;
@@ -829,6 +825,30 @@ static int service_verify(Service *s) {
         return 0;
 }
 
+static int service_add_default_dependencies(Service *s) {
+        int r;
+
+        assert(s);
+
+        /* Add a number of automatic dependencies useful for the
+         * majority of services. */
+
+        /* First, pull in base system */
+        if (s->meta.manager->running_as == MANAGER_SYSTEM) {
+
+                if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
+                        return r;
+
+        } else if (s->meta.manager->running_as == MANAGER_SESSION) {
+
+                if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
+                        return r;
+        }
+
+        /* Second, activate normal shutdown */
+        return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
+}
+
 static int service_load(Unit *u) {
         int r;
         Service *s = SERVICE(u);
@@ -869,11 +889,19 @@ static int service_load(Unit *u) {
                                 return r;
 
                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
-                            return r;
+                                return r;
                 }
 
                 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
                         s->notify_access = NOTIFY_MAIN;
+
+                if (s->type == SERVICE_DBUS || s->bus_name)
+                        if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_DBUS_TARGET, NULL, true)) < 0)
+                                return r;
+
+                if (s->meta.default_dependencies)
+                        if ((r = service_add_default_dependencies(s)) < 0)
+                                return r;
         }
 
         return service_verify(s);
@@ -2449,21 +2477,13 @@ static int service_enumerate(Manager *m) {
                                 service = unit_follow_merge(service);
 
                                 if (de->d_name[0] == 'S') {
-                                        Unit *runlevel_target;
-
-                                        if ((r = manager_load_unit(m, rcnd_table[i].target, NULL, &runlevel_target)) < 0)
-                                                goto finish;
 
-                                        if ((r = unit_add_dependency(runlevel_target, UNIT_WANTS, service, true)) < 0)
-                                                goto finish;
-
-                                        if ((r = unit_add_dependency(service, UNIT_BEFORE, runlevel_target, true)) < 0)
+                                        if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, rcnd_table[i].target, NULL, true)) < 0)
                                                 goto finish;
 
                                 } else if (de->d_name[0] == 'K' &&
                                            (rcnd_table[i].type == RUNLEVEL_DOWN ||
                                             rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
-                                        Unit *shutdown_target;
 
                                         /* We honour K links only for
                                          * halt/reboot. For the normal
@@ -2481,13 +2501,7 @@ static int service_enumerate(Manager *m) {
                                          * too to the shutdown
                                          * target.*/
 
-                                        if ((r = manager_load_unit(m, SPECIAL_SHUTDOWN_TARGET, NULL, &shutdown_target)) < 0)
-                                                goto finish;
-
-                                        if ((r = unit_add_dependency(service, UNIT_CONFLICTS, shutdown_target, true)) < 0)
-                                                goto finish;
-
-                                        if ((r = unit_add_dependency(service, UNIT_BEFORE, shutdown_target, true)) < 0)
+                                        if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0)
                                                 goto finish;
                                 }
                         }
@@ -2625,8 +2639,8 @@ static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
 
 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
-        [SERVICE_FORKING] = "forking",
         [SERVICE_SIMPLE] = "simple",
+        [SERVICE_FORKING] = "forking",
         [SERVICE_FINISH] = "finish",
         [SERVICE_DBUS] = "dbus",
         [SERVICE_NOTIFY] = "notify"